1 /* 2 * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.nio.zipfs; 27 28 import java.io.IOException; 29 import java.nio.file.Files; 30 import java.nio.file.FileStore; 31 import java.nio.file.FileSystems; 32 import java.nio.file.Path; 33 import java.nio.file.attribute.BasicFileAttributes; 34 import java.nio.file.attribute.FileAttributeView; 35 import java.nio.file.attribute.FileStoreAttributeView; 36 import java.nio.file.attribute.BasicFileAttributeView; 37 import java.util.Formatter; 38 39 /* 40 * 41 * @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal 42 */ 43 44 class ZipFileStore extends FileStore { 45 46 private final ZipFileSystem zfs; 47 48 ZipFileStore(ZipPath zpath) { 49 this.zfs = zpath.getFileSystem(); 50 } 51 52 @Override 53 public String name() { 54 return zfs.toString() + "/"; 55 } 56 57 @Override 58 public String type() { 59 return "zipfs"; 60 } 61 62 @Override 63 public boolean isReadOnly() { 64 return zfs.isReadOnly(); 65 } 66 67 @Override 68 public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) { 69 return (type == BasicFileAttributeView.class || 70 type == ZipFileAttributeView.class); 71 } 72 73 @Override 74 public boolean supportsFileAttributeView(String name) { 75 return name.equals("basic") || name.equals("zip"); 76 } 77 78 @Override 79 @SuppressWarnings("unchecked") 80 public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) { 81 if (type == null) 82 throw new NullPointerException(); 83 return (V)null; 84 } 85 86 @Override 87 public long getTotalSpace() throws IOException { 88 return new ZipFileStoreAttributes(this).totalSpace(); 89 } 90 91 @Override 92 public long getUsableSpace() throws IOException { 93 return new ZipFileStoreAttributes(this).usableSpace(); 94 } 95 96 @Override 97 public long getUnallocatedSpace() throws IOException { 98 return new ZipFileStoreAttributes(this).unallocatedSpace(); 99 } 100 101 @Override 102 public Object getAttribute(String attribute) throws IOException { 103 if (attribute.equals("totalSpace")) 104 return getTotalSpace(); 105 if (attribute.equals("usableSpace")) 106 return getUsableSpace(); 107 if (attribute.equals("unallocatedSpace")) 108 return getUnallocatedSpace(); 109 throw new UnsupportedOperationException("does not support the given attribute"); 110 } 111 112 private static class ZipFileStoreAttributes { 113 final FileStore fstore; 114 final long size; 115 116 public ZipFileStoreAttributes(ZipFileStore fileStore) 117 throws IOException 118 { 119 Path path = FileSystems.getDefault().getPath(fileStore.name()); 120 this.size = Files.size(path); 121 this.fstore = Files.getFileStore(path); 122 } 123 124 public long totalSpace() { 125 return size; 126 } 127 128 public long usableSpace() throws IOException { 129 if (!fstore.isReadOnly()) 130 return fstore.getUsableSpace(); 131 return 0; 132 } 133 134 public long unallocatedSpace() throws IOException { 135 if (!fstore.isReadOnly()) 136 return fstore.getUnallocatedSpace(); 137 return 0; 138 } 139 } 140 }